Crust: in a blender, blend oreos until crumbs form then add butter and process again. Place evenly in greased springform pan

Chocolate mousse layer steps: mix cold water + gelatin and let it sweel for 5-10 minutes. Meanwhile, mix Dark chocolate with whipping cream in a bowl and melt in on low heat

After 10 minutes, heat the gelatin mix a bit and then add it to the Dark chocolate mix and mix it together. Let it cool completely

In a separate bowl, add whipping cream, whip it and then add the chocolate mix and whip it until a thick consistency is formed

Place the layer on the pan evenly and let it cool in the fridge for 20 minutes

Repeat the same steps for milk chocolate and add it to the pan after the 20 minutes and keep it in the fridge for another 20

Repeat the same step for the white chocolate and keep it for another 20

Decorate with cocoa powder and keep it in the fridge to cool